<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">

<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<form action="/login" method="post">
  用户名:<input type="text" name="username">
  密码:<input type="password" name="password">
  <input type="submit" value="登录">
</form>
</body>
</html>